中国北方草地委陵菜属植物生物量分配的空间特征分析OA

Potentilla plants are abundant and widely distributed in the grasslands of northern China.The biomass allocation of Potentilla affects soil carbon input and,consequently,the terrestrial ecosystem carbon cycle.In this study,Potentilla plants were used as the research subject.By comparing interspecific and intraspecific differences in root-shoot ratio of different Potentilla species across grasslands in northern China,the spatial distribution characteristics of Potentilla were revealed,and the relationship between biomass allocation and climate factors was explored.The results showed significant differences at the 0.05 level in root-shoot ratio among Potentilla species,with considerable spatial variation but limited explanatory power of climate factors.The above-and belowground biomass and root-shoot ratio of P.anserina were strongly influenced by climate factors.Further analysis using principal component analysis and structural equation modeling showed that phylogenetic branch distance had a greater effect on biomass allocation than climate factors.However,for P.anserina alone,the effect and explanatory power of climate factors on biomass allocation were higher than all Potentilla species combined.Moreover,the biomass allocation of P.anserina was mainly affected by two climatic factors:temperature and precipitation.